Buggy code:
public HandleFactory handleFactory ; public char [ ] [ ] [ ] allSuperTypeNames ; public MatchLocatorParser parser ; private Parser basicParser ; public INameEnvironment nameEnvironment ; public NameLookup nameLookup ; public LookupEnvironment lookupEnvironment ; public HierarchyResolver hierarchyResolver ; public CompilerOptions options ; public int numberOfMatches ; public PossibleMatch [ ] matchesToProcess ; public PossibleMatch currentPossibleMatch ; public long resultCollectorTime = 0 ; public class LocalDeclarationVisitor extends ASTVisitor { IJavaElement enclosingElement ; MatchingNodeSet nodeSet ; HashtableOfIntValues occurrencesCounts = new HashtableOfIntValues ( ) ; public LocalDeclarationVisitor ( IJavaElement enclosingElement , MatchingNodeSet nodeSet ) { } public boolean visit ( TypeDeclaration typeDeclaration , BlockScope unused ) { } } public static class WorkingCopyDocument extends JavaSearchDocument { public ICompilationUnit workingCopy ; WorkingCopyDocument ( ICompilationUnit workingCopy , SearchParticipant participant ) { } public String toString ( ) { } } public class WrappedCoreException extends RuntimeException { public CoreException coreException ; public WrappedCoreException ( CoreException coreException ) { } } public static SearchDocument [ ] addWorkingCopies ( InternalSearchPattern pattern , SearchDocument [ ] indexMatches , ICompilationUnit [ ] copies , SearchParticipant participant ) { } public static void setFocus ( InternalSearchPattern pattern , IJavaElement focus ) { } private static HashMap workingCopiesThatCanSeeFocus ( ICompilationUnit [ ] copies , IJavaElement focus , boolean isPolymorphicSearch , SearchParticipant participant ) { } public static ClassFileReader classFileReader ( IType type ) { } public static SearchPattern createAndPattern ( final SearchPattern leftPattern , final SearchPattern rightPattern ) { } public static void findIndexMatches ( InternalSearchPattern pattern , Index index , IndexQueryRequestor requestor , SearchParticipant participant , IJavaSearchScope scope , IProgressMonitor monitor ) throws IOException { } public static IJavaElement getProjectOrJar ( IJavaElement element ) { } public static boolean isPolymorphicSearch ( InternalSearchPattern pattern ) { } public static IJavaElement projectOrJarFocus ( InternalSearchPattern pattern ) { } public MatchLocator ( SearchPattern pattern , SearchRequestor requestor , IJavaSearchScope scope , IProgressMonitor progressMonitor ) { } public void accept ( IBinaryType binaryType , PackageBinding packageBinding ) { } public void accept ( org . eclipse . jdt . internal . compiler . env . ICompilationUnit sourceUnit ) { } public void accept ( ISourceType [ ] sourceTypes , PackageBinding packageBinding ) { } protected Parser basicParser ( ) { } protected void buildBindings ( PossibleMatch possibleMatch ) { } protected BinaryTypeBinding cacheBinaryType ( IType type ) throws JavaModelException { } protected char [ ] [ ] [ ] computeSuperTypeNames ( IType focusType ) { } protected IJavaElement createHandle ( AbstractMethodDeclaration method , IJavaElement parent ) { } protected IJavaElement createHandle ( FieldDeclaration fieldDeclaration , TypeDeclaration typeDeclaration , IJavaElement parent ) { } protected boolean createHierarchyResolver ( IType focusType , PossibleMatch [ ] possibleMatches ) { } protected IJavaElement createImportHandle ( ImportReference importRef ) { } protected IType createTypeHandle ( String simpleTypeName ) { } protected boolean encloses ( IJavaElement element ) { } protected IBinaryType getBinaryInfo ( ClassFile classFile , IResource resource ) throws CoreException { } protected IType getFocusType ( ) { } protected void getMethodBodies ( CompilationUnitDeclaration unit ) { } protected boolean hasAlreadyDefinedType ( CompilationUnitDeclaration parsedUnit ) { } public void initialize ( JavaProject project , int possibleMatchSize ) throws JavaModelException { if ( ( this . nameEnvironment ) != null ) this . nameEnvironment . cleanup ( ) ; SearchableEnvironment searchableEnvironment = ( ( SearchableEnvironment ) ( project . newSearchableNameEnvironment ( this . workingCopies ) ) ) ; <START_BUG> this . nameEnvironment = ( possibleMatchSize == 1 ) ? ( ( INameEnvironment ) ( searchableEnvironment ) ) : ( ( INameEnvironment ) ( new JavaSearchNameEnvironment ( project ) ) ) ; <END_BUG> this . options = new CompilerOptions ( project . getOptions ( true ) ) ; ProblemReporter problemReporter = new ProblemReporter ( DefaultErrorHandlingPolicies . proceedWithAllProblems ( ) , this . options , new DefaultProblemFactory ( ) ) ; this . lookupEnvironment = new LookupEnvironment ( this , this . options , problemReporter , this . nameEnvironment ) ; this . parser = MatchLocatorParser . createParser ( problemReporter , this ) ; this . nameLookup = searchableEnvironment . nameLookup ; this . numberOfMatches = 0 ; this . matchesToProcess = new PossibleMatch [ possibleMatchSize ] ; } protected void locateMatches ( JavaProject javaProject , PossibleMatch [ ] possibleMatches , int start , int length ) throws CoreException { } protected void locateMatches ( JavaProject javaProject , PossibleMatchSet matchSet ) throws CoreException { } public void locateMatches ( SearchDocument [ ] searchDocuments ) throws CoreException { } public void locatePackageDeclarations ( SearchParticipant participant ) throws CoreException { } protected void locatePackageDeclarations ( SearchPattern searchPattern , SearchParticipant participant ) throws CoreException { } protected IType lookupType ( ReferenceBinding typeBinding ) { } public SearchMatch newDeclarationMatch ( IJavaElement element , int accuracy , int offset , int length ) { } public SearchMatch newDeclarationMatch ( IJavaElement element , int accuracy , int offset , int length , SearchParticipant participant , IResource resource ) { } public SearchMatch newFieldReferenceMatch ( IJavaElement enclosingElement , int accuracy , int offset , int length , ASTNode reference ) { } public SearchMatch newLocalVariableReferenceMatch ( IJavaElement enclosingElement , int accuracy , int offset , int length , ASTNode reference ) { } public SearchMatch newMethodReferenceMatch ( IJavaElement enclosingElement , int accuracy , int offset , int length , ASTNode reference ) { } public SearchMatch newPackageReferenceMatch ( IJavaElement enclosingElement , int accuracy , int offset , int length , ASTNode reference ) { } public SearchMatch newTypeReferenceMatch ( IJavaElement enclosingElement , int accuracy , int offset , int length , ASTNode reference ) { } protected void process ( PossibleMatch possibleMatch , boolean bindingsWereCreated ) throws CoreException { } protected void purgeMethodStatements ( TypeDeclaration type , boolean checkEachMethod ) { } protected void reduceParseTree ( CompilationUnitDeclaration unit ) { } public SearchParticipant getParticipant ( ) { } protected void report ( SearchMatch match ) throws CoreException { } protected void reportAccurateTypeReference ( ASTNode typeRef , char [ ] name , IJavaElement element , int accuracy ) throws CoreException { }

Fix:
this . nameEnvironment = ( possibleMatchSize == 1 ) ? ( ( INameEnvironment ) ( searchableEnvironment ) ) : ( ( INameEnvironment ) ( new JavaSearchNameEnvironment ( project , this . workingCopies ) ) ) ;